Properties of a Homologous Series of o-Hydroxy Substituted Anils and Some Binary Mixtures

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Abstract
In an earlier report,(1) an o-hydroxy substituted analog (OHMBBA) of the room temperature nematic N-(p-methoxybenzylidene)-p-n-butylaniline (MBBA) was prepared, and intramolecular hydrogen bonding was found to stabilize the compound against cleavage of the anil linkage. To examine the properties of this class of compounds, the synthesis of several such o-hydroxy substituted compounds was undertaken, and their liquid crystalline properties determined. Two broad temperature range binary systems were also examined consisting of OHMBBA mixed with N-(p-ethoxybenzylidene)-p-n-butylaniline (EBBA), and OHMBBA mixed with N-(p-methoxybenzylidene)-p-n-pentylaniline (MPBA) and their phase diagrams determined. The dynamic scattering behavior of one of these binaries—50-50 OHMBBA-EBBA—was examined.

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